Concrete-mixing apparatus.



PATENTED MAY 26, 1908.

c. B. DUNN.

CONCRETE MIXING APPARATUS.

APPLICATION FILED JUNE ll 1907.

2 SHEETS-*SHEET l,

Illu

PATBNTED MAY 26, 1908.

C. B. DUNN` CONCRETE MIXING APPARATUS.

APPLIOATIGN FILED JUNE 1, i907.

2 SHEETS-SHEET 2` A TTORNEYS CII " 'cnAnLns BnsnnnLL DUNN, or Annone, ALABAMA.

'concesse-remind assesseurs.

nto. essere.

State of Alabeina, have invented a new endusefnl ConcreteMix.ing Apparatus, of which the following isa specification.

This invention relates to concrete mixing apparatus and is more particularly designed for mixing concrete.

The ohgect of the invention is to combine a' hoisting bucket with mechanism whereby the contents of the bucket will be thoroughly mixed during the hoistino operation and a predeterminedv uejntity of Vliquid Keommingled therewith so thet upon the lowering of the bucket a thoroughly mixed product can he discharged therefrom.

A still further object is to. provide valve mechanism of'novcl form designed to oper ate so as to permit a predetermined quantity of liquid contained Within the bucket to hecoine mixed with the other contents of the bucket.

With these and other objects .in View the invention consists of certain novel features oi construction and combinations of parts which will he hereinafter more fully'- described and pointed out in the claims.

in the accompanying drawings is shown the preferred i'orm of the invention.

ln said drawings: Figure l is a-section through a mixing bucket embodying the present improvements. Fig. 2 is a perspective view of a portion of a bucket and show-' ing the relative arrangement of one of the reservoirs within the bucket. .Figs 3 is a a section through the plate ,on line enlarged detail view side elevation of the bucket and its hoisting mechanism, one corner of the bucket being removed. "Fig Il is an enlarged section through one corner of the bucket end through the reservoir therein. llig. is an of one of 'the partition lates designed to be secured within the ucket to forni a corner reservoir. is

5', ythe ilanges of the plate bei bent into position to properly rest upon the Walls of the bucket. Fig. 7 is an emlerged end view of one of the va ves. Fig. 8 is e. detail view of a clutch connection employed inthe de- Referring to the igures reference, l. designates a yo'fli' porting brackets?? thereon in hated shaft one-en characters lof e' having sup- .ivhichis jour- Specication of Letters Patent.

Application iled fune i, 19d?. Serial No. 376,779.

rtje-eich is me ions Patented May 26, 1908.

naled in an arm 4 extending from one side of the yoke. Secured to the shaft 3 inl any suitable manner and between the brackets 2 is a pulley 5 about which is designed to be wound a hoisting rope or cable 6. A sprocket 7 is 'secured to the shaft 3 and supports a chain 8 which extends under and is designed to rotate a sprocket 9. This last mentioned sprocket is secured to one end ortion of a tubular sha-tt 10 the ends of whic 1 are within the end ortions of the yoke. Secured u on this tubular shaft is s. bucket il prefere ly rectangular in form and two of the corners ci' this bucket are preferably divided from the body portion thereof by means of trianruler partitions l2 which7 as shown particu llarly m Figs. 5 and 6, are provided with flanges i3 designed to be rivetedor otherwise secured to the Walls of the bucket. Preferably two of these partitions are rovided at diametrically opposite corners vo the bucket so that in addition to the main compartment le within the bucket two reservoirs such as indicated at are also provided. These reservoirs have suitably closed inlets 16 whereby Water or other liquid to be mixed withthe contents of compartment 14 may be placed within the reservoirs. A door l7.is ringed to one face of the bucket and constitutes a closure for compartment 1li. This door is held normally closed by one or more spring catches i8 and extending between these catches and that wall of the bucket to which they are fastened is a shaft'lQ formed with one or more cranks 2O designed to hear against the inner faces ofthe cato es 18. A lever 2l is secured to the shaft 19 and by pulling out- Ward on this lever the crank or cranks 20 can be sWunO against the catch or catches 18 so as to pu them out of engagement with the closure 17. l 'provided 'for the purpose of holding the lever in redetermined position.

.A spring clip 22 is preferably ervoir 15 to t e tubular shaft `10- and this shaft has a series ooutlet apertures 24 open.- i

ang into the compartment' le. The two 23 are nor-molli; closed .by means of sli a le platone 25 which are rigldly connected in any suitable manner as b [means efe-rod 26. These pistons' areyho our, the ends thereof 1 being provided 'with cross strips 2Zesshown v y l -in-Fig; Zytheinner or adjoining cross strips lrl..

of the tivo pstonseeing connected to the rod 2d.. Swiveled witlim the outer cross strip offene of thenistons 'one end of aiscrevf' which extend sbeyondand engages one end. of thetubular shaft and has an arm 29 extending at right angles from its outer end.

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This arm lprojects through a slot 30 formed Within a holding tinger 31 which is fastened to the yoke 1 and extends laterally therefrom.

In using the mixing device herein described the two reservoirs l5 are l'irst filled with Water or other liquid to be used in the mixture, after which the desired uantity of sand, cement, or other materia is laced within the compartment 1li-and the c osure 17 shut and secured. It is .to be understood that the normal positions of the pistons 25 are across the inner ends oi the p1 es 23 so that it is impossible for liquid within the reservoirs to escape'therefrom and through the openings 24 in shaft 10. After the material has been placed in the bucket the bucket is hoisted by means of the cable 6. This will obviously cause the pulle 5 and shaft 3' to rotate and motion will therefore be transmitted from the s rocket 7 and throu h the chain 8 to sproc ret 9 and shaft 10. s th'e"bucket is secured to this shaft said shaft and bucket will rotate together. As the screw 28 is held a ainst rotation by arm 29 and finger 31 it is o vious that as the shaft '10 revolves the screw will be moved longitudinally therein so as to Withdraw the istons from across the ends of pipes 23.

his opxening of the valves occurs preferably u on t e completion of about six revolutions o the bucket, whereupon the arm 29 moves out of engagement with linger 31.v Therefore as soon as the bucket has been raised to a certain height the pipes 23 will be opened and the liquid contents of the reservoirs will flow therethrough and into the shaft 1() and thence through the o enings 2e. 1t will therefore be ischarger upon the solid con tents of the compartment 14 and mixed therewith. When the bucket is lowered the pistons can then be returned to their ynormal positions. The rotation of the bucket during the return movement will a. itate the contents of thc bucket and cause t ein to be thoroughly mixed so that when ythe bucket returns to the oint from which it is raised the same can e opened and the mixture dropped therefrom in condition forise. It will be seen that the device is very sim- -'ple, durable and eflicient and constitutes a convenient means for mixing concrete', and'- at the same time conveying it to a suitable point for use. It is particularly designed for use upon derricks and the like because the parts to be mixed can be placed in the bucket at one point and can be raised and conveyed to the point of use. the raising und lowering of the bucket serving if mii' the contents tbcrcol'. A suilable clutch run, il flsired, be placed on the sprocket ,m that the burla-t need not revolve when lowering, unitruabling the opera-tor to turn the bucket when esente establishing or closin communication between the reservoir an the mixing chamber.

2. The combination with revoluble means adapted to engage and to be rotated by a hoisting element, and a. bucket movablewith said means and having a mixing chamber and a reservoir of mechanism operated by said means for rotating the bucket, a valve, and `means operated by therotation of the bucket for shifting4 the valve to coen or close communication between the reservoir and the mixing chamber. y

3. T he combination with revoluble means adapted to engage and to be rotated by a. hoisting element, and a bucket movable with said means and having a receiver and a mix ing chamber; of mechanism for' transmitting rotary motion from saisi means to the bucket, a valve for closing cc'. munies-tion between the reservoir and mixing chamber, means operated by the rotation of the bucket for actuating the valve to open or close communication between the reservoir and mixing chamber, and means for distributing the discharged contents of the reservoir within the mixing chamber. s

tubular apertured shaft in said bucket having a mixingr chamber and having a reservoir opening into the shaft, a valve Within the shaft for closing communication between the reservoir and mixing chamber, a revoluble element supported above and movable with the bucket, a hoisting element adapted to engage and rotate said ievoluble element, I mechanism for transmitting rotary motion from said means to the shaft and bucket, and means operated by the rotation oi the bucket for rotating the valve.

5. Mixing apparatus comprising a bucket having a; mixing chamber, a tubular apertured sha t therein and revoluble therewith, said bucket having a reservoir movable therewith and opening into the shaft, a valve Within the shaft for' closing communication between the reservoir and mixing chamber, rcvolublc means above and movable with tbc bucket, n hoisting elfuuut disposed to cugagi und lo :winnio said revohlble moans, mwluuiisml for transmitting rotar) motion from said moans lo the shalt, a Vidi/cd actuating screw engaging thc shaft, and means -sss,975 v 8 forholding the screw a ainst rotation during the rotation of the sha t. i

` 6. Mixing apparatus comprising' a yoke, revoluble means thereon, ahoisting element means, a tubular apertured shaft journaled within the yoke, a bucket revoiuble there- A With, mechanism for transmitting rotary motion from said revoiuble means to the 10 shaft, a valve Within the shaft, an actuating screw connected thereto and engaging the shaft, and means upon the yoke and screw for holding said screw against rotation, said bucket having a-reservoir movable therewith 15 and opening into the shaft, said valve being disposed. tov close communication between the reservoir and shaft.

7. The combination with hoisting mecha'nism; of a bucket having a mixing chamber 20 and a reservoir, means operated by the hoistadapted to engage and actuate said revoluble Aoperated bythe hoisting mechanism for miiing the contents oflthe bucket, and means 3c o erated by the hoisting mechanism 'and cal"- ,K f

ried by the bucket for estabiishing commu cation-between the bucket Aand reserioir /J Intestimony that I claim the foregog as. my own, I have hereto affixed my signature 35j in the presence of two witnesses.

` CHARLESv-BUSHNELL DUNN. Witnesses: 2 j

C s. F. CNNom* A. C. -SHAN'Ks 'p 

